Rechargeable blender with offset blades

1. A portable and rechargeable blender configured to blend foodstuffs, the blender comprising: a base assembly, a container assembly, and control circuitry, wherein the base assembly includes: an upper blade mount having a horizontal top surface; a set of blades supported by a shaft that is rotationally mounted below the upper blade mount, wherein the set of blades is configured to rotate around a rotational axis and blend the foodstuffs, wherein the horizontal top surface of the blade mount is orthogonal to the rotational axis, wherein the set of blades has a blade diameter during blending by the blender; an electrical motor configured to drive the rotation of the set of blades, wherein the electrical motor is integrated into the base assembly, wherein the electrical motor is arranged below the set of blades and in line with the rotational axis; a rechargeable battery configured to power the electrical motor; a standardized charging interface configured to conduct electrical power to the rechargeable battery; and a first mechanical coupling configured to couple the base assembly to the container assembly; wherein the base assembly includes a horizontal surface between the base assembly and the container assembly during blending; wherein the base assembly has a cylindrical shape, wherein the cylindrical shape has a base diameter around an outer periphery of the base assembly near the first mechanical coupling, wherein the container assembly is configured to hold the foodstuffs within a cylindrical container body during blending by the blender, wherein the container assembly includes: a proximal end that is open and that is disposed, subsequent to the base assembly being coupled to the container assembly, near the set of blades; a distal end opposite the proximal end; a second mechanical coupling disposed at or near the proximal end of the container assembly, wherein the second mechanical coupling is configured to engage the first mechanical coupling to couple the base assembly to the container assembly; and the cylindrical container body extending from the second mechanical coupling to the distal end, wherein the cylindrical container body has a container diameter immediately above the second mechanical coupling, wherein diameters of the container assembly are substantially constant between immediately above the second mechanical coupling and the distal end of the container assembly, wherein a length of the container diameter matches a length of the base diameter, wherein, subsequent to the base assembly being coupled to the container assembly by engagement between the first mechanical coupling and the second mechanical coupling, the portable and rechargeable blender has a cylindrical shape such that, between the outer periphery of the base assembly and immediately above the second mechanical coupling, a diameter of the cylindrical shape of the portable and rechargeable blender is substantially constant, wherein the blade diameter is at least 50% of the container diameter, wherein the cylindrical container body has a longitudinal axis between the proximal end and the distal end, wherein the longitudinal axis is parallel to the rotational axis, wherein the rotational axis is offset by an offset distance from the longitudinal axis, wherein the offset distance is between 5% and 15% of the container diameter; and wherein the control circuitry is configured to control the electrical motor during rotation of the set of blades.

2. The blender of claim 1 , wherein the offset distance is between 10% and 20% of the blade diameter.

3. The blender of claim 1 , wherein the set of blades is mounted permanently to the base assembly, wherein the electrical motor is integrated permanently into the base assembly, and wherein the rechargeable battery is integrated permanently into the base assembly such that the base assembly forms an integral whole.

4. The blender of claim 1 , further comprising a power button configured to be engaged manually by a user to turn the blender on and off, wherein the power button is included in the base assembly.

5. The blender of claim 1 , wherein the set of blades includes two distal blade ends that are arranged apart by a distance equal to the blade diameter, wherein the set of blades is arranged such that a plane of rotation defined by the two distal blade ends during blending is orthogonal to the rotational axis.

6. The blender of claim 1 , wherein the base assembly has a front side, a back side, a left side, and a right side, wherein the rotational axis is offset by the offset distance from the longitudinal axis such that the rotational axis is closer to the back side of the base assembly than to the front side of the base assembly, and further such that the rotational axis is equidistant from the left side and the right side of the base assembly.

7. The blender of claim 1 , further comprising a detector, wherein the detector is configured to make a detection whether the base assembly is coupled to the container assembly in a manner operable and suitable for blending by the blender, and wherein the control circuitry is further configured to allow or prevent rotation of the set of blades, based on the detection by the detector.

8. The blender of claim 7 , wherein the cylindrical container body includes one or more magnetic elements disposed at or near the proximal end of the container assembly, and wherein detection by the detector is based on proximity of magnetic elements in the detector with the one or more magnetic elements included in the cylindrical container body.

9. The blender of claim 1 , wherein the cylindrical container body has a circular cross section.

10. The blender of claim 1 , where the rechargeable battery is not user-replaceable.

11. The blender of claim 1 , wherein the standardized charging interface is a universal serial bus (USB) port configured to receive an electrical connector for charging the rechargeable battery.

12. The blender of claim 1 , wherein the standardized charging interface is configured to support wireless charging of the rechargeable battery.

13. The blender of claim 1 , wherein the first and second mechanical couplings are threaded couplings.

14. The blender of claim 1 , wherein the container assembly has a volume between 8 and 48 ounces.

15. The blender of claim 1 , wherein the base assembly has a cylindrical shape having a diameter between 2 and 4 inches.

16. The blender of claim 1 , wherein the rechargeable battery has a capacity between 1000 mAh and 6000 mAh.

17. The blender of claim 1 , wherein the electrical motor is configured to operate at a voltage between SV and 10V, and wherein the electrical motor is configured to spin the set of one or more blades at a speed between 20,000 and 35,000 rotations per minute.

18. The blender of claim 1 , wherein the control circuitry is included in the base assembly.